EP 1580886 A1 20050928 - FILTER DEVICE
Title (en)
FILTER DEVICE
Title (de)
FILTERVORRICHTUNG
Title (fr)
DISPOSITIF DE FILTRAGE
Publication
Application
Priority
- JP 0314561 W 20031117
- JP 2002335741 A 20021119
Abstract (en)
[origin: US2006001482A1] A filter device is provided that can easily achieve reduction in current consumption and whose variations can be corrected. A phase difference of a reference filter is detected by a phase difference detector, a control signal for correcting variations that is obtained as a result of the detection is held in a register, and a cut-off frequency of a main filter is selected according to the control signal thus held. Thus, once variations are detected, the reference filter and the phase difference detector that are used for detection of variations become no longer necessary and their operations can be halted, thereby achieving reduction in current consumption.
IPC 1-7
IPC 8 full level
H03H 11/04 (2006.01); H03H 11/12 (2006.01); H03L 7/00 (2006.01)
CPC (source: EP KR US)
H03H 11/04 (2013.01 - KR); H03H 11/1291 (2013.01 - EP US); H03L 7/00 (2013.01 - EP US)
Citation (search report)
See references of WO 2004047291A1
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
US 2006001482 A1 20060105; CN 1781248 A 20060531; EP 1580886 A1 20050928; JP 2004172911 A 20040617; KR 20050075437 A 20050720; WO 2004047291 A1 20040603
DOCDB simple family (application)
US 53554205 A 20050518; CN 200380103646 A 20031117; EP 03772801 A 20031117; JP 0314561 W 20031117; JP 2002335741 A 20021119; KR 20057008994 A 20050519